My .bash_profile

.bash_profile

export PATH=$PATH:~/bin
export EDITOR='subl -w'
export CLICOLOR=1

alias sl="subl"
alias ll="ls -al"
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*

function git_branch {
    ref=$(git symbolic-ref HEAD 2> /dev/null) || return;
    echo "("${ref#refs/heads/}") ";
}

function git_since_last_commit {
  now=`date +%s`;
  last_commit=$(git log --pretty=format:%at -1 2> /dev/null) || return;
  seconds_since_last_commit=$((now-last_commit));
  minutes_since_last_commit=$((seconds_since_last_commit/60));
  hours_since_last_commit=$((minutes_since_last_commit/60));
  minutes_since_last_commit=$((minutes_since_last_commit%60));

  echo "${hours_since_last_commit}h${minutes_since_last_commit}m ";
}

PS1="[\[\033[1;32m\]\w\[\033[0m\]] \[\033[0m\]\[\033[1;36m\]\$(git_branch)\[\033[0;33m\]\$(git_since_last_commit)\[\033[0m\]$ "